172 lines
9.0 KiB
JSON
172 lines
9.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-56624",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-27T14:03:06.017Z",
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"datePublished": "2024-12-27T14:51:27.318Z",
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"dateUpdated": "2026-10-15T21:41:47.207Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:45:30.290Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix out_fput in iommufd_fault_alloc()\n\nAs fput() calls the file->f_op->release op, where fault obj and ictx are\ngetting released, there is no need to release these two after fput() one\nmore time, which would result in imbalanced refcounts:\n refcount_t: decrement hit 0; leaking memory.\n WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230\n Call trace:\n refcount_warn_saturate+0x60/0x230 (P)\n refcount_warn_saturate+0x60/0x230 (L)\n iommufd_fault_fops_release+0x9c/0xe0 [iommufd]\n ...\n VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd])\n WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0\n Call trace:\n filp_flush+0x3c/0xf0 (P)\n filp_flush+0x3c/0xf0 (L)\n __arm64_sys_close+0x34/0x98\n ...\n imbalanced put on file reference count\n WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138\n Call trace:\n __file_ref_put+0x100/0x138 (P)\n __file_ref_put+0x100/0x138 (L)\n __fput_sync+0x4c/0xd0\n\nDrop those two lines to fix the warnings above."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Triggered via the IOMMU_FAULT_QUEUE_ALLOC ioctl on the local device file /dev/iommu (or /dev/vfio/vfio); no network reachability.\nAC:L - The caller reliably forces the error path (e.g. exhausting RLIMIT_NOFILE so get_unused_fd_flags fails, or passing a bad user pointer to fail iommufd_ucmd_respond); no uncontrolled race or memory-layout precondition.\nPR:L - Only a basic unprivileged local user with access to the iommufd/vfio device node is needed (/dev/vfio/vfio is mode 0666 with CONFIG_IOMMUFD_VFIO_CONTAINER); no capability or root required, and no device must be attached.\nUI:N - The ioctl is issued directly by the attacker; no action by any other user is required.\nS:U - The corruption stays within the kernel's own security authority; it is a refcount/UAF bug, not an IOMMU-translation or VM boundary bypass.\nC:H - The double put underflows a struct file refcount and the fault object is freed while still referenced, a use-after-free whose freed-object contents the attacker can control to read arbitrary kernel memory.\nI:H - The use-after-free / refcount underflow on a struct file enables heap grooming and arbitrary-write primitives, potentially leading to privilege escalation.\nA:H - The imbalanced refcounts cause premature frees and warnings that reliably lead to kernel oops/panic on any triggering invocation."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iommu/iommufd/fault.c"
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],
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"versions": [
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{
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"version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
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"lessThan": "2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
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"lessThan": "af7f4780514f850322b2959032ecaa96e4b26472",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/iommu/iommufd/fault.c"
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],
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"versions": [
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{
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"version": "6.11",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.11",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.5",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11",
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"versionEndExcluding": "6.12.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11",
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"versionEndExcluding": "6.13"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d"
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},
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{
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"url": "https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472"
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}
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],
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"title": "iommufd: Fix out_fput in iommufd_fault_alloc()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-56624",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:41:07.307658Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T21:41:47.207Z"
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}
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}
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}
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} |